from tkinter import *

coords = [0,0,10,0,10,10,20,10,20,20,10,20,20,10,30,0,30]

root = Tk()
root.title("ИТ марафон")
root.geometry ("500x500")

canvas = Canvas (bg="white", width = 500, height = 500)
canvas.pack (anchor = CENTER, expand=1)
canvas.create_polygon (coords)
root.mainloop()
